Abstract
Cadmium (Cd), a non-essential heavy metal that cannot be naturally degraded, causes toxicity for plant, animal and human due to the easy incorporation into the food chain with its high mobility in soil-plant system. Tobacco (Nicotiana tabacum L.) contrary to other crops, has ability to absorb and accumulate high concentration of Cd in the leaves without showing phytotoxicity symptom. The purpose of this study was to investigate the effects of zinc (Zn) applications on chemical composition of tobacco leaves under increased doses of Cd under greenhouse conditions. The experimental layout was randomized plots with three replicates, and two different tobacco genotypes (Birlik-124, Xanthi-81) were used as the plant material of the experiment. Plant growing medium was a Zn-deficient calcareous soil, and plants were treated with increasing Cd (0, 2.5, 5.0 and 10 mg kg-1 soil) and Zn (0 and 5 mg kg-1 soil) doses. The tobacco leaves were harvested in three times and all harvested leaves were dried under sunlight. The leaf samples were analyzed for Cd and Zn concentrations, nicotine, glucose, fructose, chlorogenic and rutin contents. The Cd concentration from leaves of both tobacco genotypes significantly increased (P<0.05) with the increase in Cd application rate, but the increase in Cd concentration decreased with Zn application. Application of increased Cd doses significantly (P<0.05) increased or decreased the nicotine content of leaves, while Zn application caused a significant increase in nicotine contents of both tobacco genotypes. The nicotine content in Birlik-124 and Xanthi-81 genotypes was 0.41 and 0.48% in control plants (Zn0), and increased up to 0.54% in plants treated with zinc (Zn5 variant). Similar to the nicotine content of both tobacco genotypes, the responses of both genotypes to Cd stress was different form each other, however, Zn application under Cd toxicity caused an increase in sugar synthesis of tobacco varieties. The results revealed that Zn plays an important role in the alleviating the negative effects of Cd stress in tobacco plants.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Increasing cadmium application significantly increased leaf cadmium concentration in both tobacco genotypes.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- leavese0
- Treatment
- increase in Cd application ratee0
- Outcome
- Cd concentration from leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cd concentration from leaves of both tobacco genotypes significantly increased (P<0.05) with the increase in Cd application rate”
Claim · model-written summary
Zinc application reduced the rise in leaf cadmium concentration.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- Zn applicatione0
- Outcome
- increase in Cd concentratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in Cd concentration decreased with Zn application.”
e1“tobacco”
Claim · model-written summary
Increasing cadmium doses significantly changed leaf nicotine content, with genotype-dependent increases or decreases.
- Taxon
- leavese0
- Treatment
- increased Cd dosese0
- Outcome
- nicotine content of leavese0
- Direction
- increased or decreasede0
Not reportedComparator
Verbatim
e0“Application of increased Cd doses significantly (P<0.05) increased or decreased the nicotine content of leaves”
Claim · model-written summary
Zinc significantly increased nicotine content in both tobacco genotypes.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Zn applicatione0
- Outcome
- nicotine contentse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn application caused a significant increase in nicotine contents of both tobacco genotypes.”
Claim · model-written summary
Birlik-124 nicotine rose from 0.41% without zinc to 0.54% with zinc.
- Taxon
- TobaccoNicotiana tabacume1
- Material
- Birlik-124e0
- Treatment
- zinc (Zn5 variant)e0
- Outcome
- nicotine contente0
- Direction
- increasede0
- Value
- 0.54%e0
- Qualifier
- 0.41e0
- Comparator
- control plants (Zn0)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nicotine content in Birlik-124 and Xanthi-81 genotypes was 0.41 and 0.48% in control plants (Zn0), and increased up to 0.54% in plants treated with zinc (Zn5 variant).”
e1“Tobacco”
Claim · model-written summary
Zinc under cadmium toxicity increased sugar synthesis in tobacco varieties.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Zn application under Cd toxicitye0
- Outcome
- sugar synthesise0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn application under Cd toxicity caused an increase in sugar synthesis of tobacco varieties.”
The same questions in other papers
zinc atom · nutrient: content · Nicotiana tabacum (tobacco)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- negative
1 paper more in this group
See all 5 papers →cadmium atom · nutrient: content · Nicotiana tabacum (tobacco)Positive and negative results
10 papers in the same direction as this paper · 1 in the opposite direction
- negative
- negative
- positive
8 papers more in this group
See all 12 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.